22221011982 has 96 divisors (see below), whose sum is σ = 49586505696. Its totient is φ = 6631372800.

The previous prime is 22221011957. The next prime is 22221011987. The reversal of 22221011982 is 28911012222.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22221011987) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 7523418 + ... + 7526370.

It is an arithmetic number, because the mean of its divisors is an integer number (516526101).

Almost surely, 2^22221011982 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22221011982, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24793252848).

22221011982 is an abundant number, since it is smaller than the sum of its proper divisors (27365493714).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22221011982 is a wasteful number, since it uses less digits than its factorization.

22221011982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3206 (or 3193 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 30.

The spelling of 22221011982 in words is "twenty-two billion, two hundred twenty-one million, eleven thousand, nine hundred eighty-two".